JP2011179370A - Turbocharger and wheel housing thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turbocharger and a wheel housing thereof that can restrain a neck 35 from being greatly deformed. <P>SOLUTION: A turbine housing 11 of the turbocharger has an exhaust passage 80 formed inside a scroll body 30, and includes the neck 35, which forms an end of the exhaust passage 80, as part of the scroll body 30. A reinforcement body 50 formed separately from the scroll body 30 is provided on the inside of the neck 35. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a turbocharger including a neck portion that has a gas passage formed in a housing main body and forms an end portion of the gas passage in a part of the main body, and a wheel housing thereof.

  As said wheel housing, the thing of patent document 1 is known, for example.

JP 2008-121470 A

  By the way, in the wheel housing including the neck part including the wheel housing of Patent Document 1, since the strength of the neck part is low, the neck part may be deformed due to, for example, vibration of the internal combustion engine.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a turbocharger and a wheel housing thereof that can suppress the occurrence of large deformation at the neck.

In the following, means for achieving the above object and its effects are described.
(1) The invention according to claim 1 is a wheel housing of a turbocharger, wherein a gas passage is formed in a housing body, and a neck portion that forms an end portion of the gas passage is formed in a part of the housing body. The gist is that a reinforcing body formed separately from the housing body is provided inside the neck.

  In this invention, since the reinforcing body formed separately from the housing body is provided inside the neck portion, that is, the neck portion is reinforced by the reinforcing body from the inside, it is possible to prevent the neck portion from being greatly deformed. be able to.

  (2) In the invention according to claim 2, in the wheel housing of the turbocharger according to claim 1, the reinforcing body rectifies the flow of gas and a joint part joined to the inner peripheral surface of the neck part. The gist is to include a rectifying unit.

  When the flow of exhaust gas flowing into the turbine housing as the wheel housing is in a non-uniform state, the pressure loss of the exhaust gas increases in the gas passage in the housing. Further, when the flow of intake air flowing out from the compressor housing as the wheel housing is in a non-uniform state, the pressure loss of the intake air increases in the intake passage on the downstream side of the housing. In the above invention, since the reinforcing body is configured including the rectifying unit that rectifies the gas flow, the gas flow flowing into the wheel housing or the gas flow flowing out of the wheel housing is rectified, whereby the gas pressure Loss can be reduced.

  (3) According to a third aspect of the present invention, in the wheel housing of the turbocharger according to the second aspect, the rectifying portion has a columnar shape, and the joint portion is a gas flow direction in the gas passage. When the cross section orthogonal to the flow path cross section is a flow path cross section, the shape in the flow path cross section forms an arc shape along the inner circumference of the neck portion, and the length of the string of the joint portion is larger than the width of the rectifying portion. The main point is that it is large.

  In this invention, since the reinforcing body is configured including the columnar rectifying portion and the arc-shaped joint portion, and the length of the string of the joint portion is larger than the width of the rectification portion, the joint between the neck portion and the joint portion A sufficient area is secured. Therefore, the joint between the neck and the reinforcing body can be further strengthened.

  (4) The invention according to claim 4 is the wheel housing of the turbocharger according to claim 3, wherein the first reinforcing body and the second reinforcing body are provided as the reinforcing body, and the first reinforcing body. The second reinforcing body is characterized in that each rectifying section is provided on the neck portion in such a manner that the respective rectifying sections intersect with each other when the respective reinforcing bodies are projected onto the flow path cross section.

  In the present invention, since two reinforcing bodies are provided, the effect of rectifying the flow of gas flowing into the wheel housing or the flow of gas flowing out of the wheel housing is enhanced as compared with the case where only one reinforcing body is provided. be able to.

  (5) The invention according to claim 5 is a wheel housing of a turbocharger, wherein a gas passage is formed in a housing body, and a neck portion that forms an end portion of the gas passage is formed in a part of the housing body. A reinforcing body formed separately from the housing main body is provided outside the neck portion, and the reinforcing body has a first portion joined to the outside of the neck portion and the same in the circumferential direction of the neck portion. The gist is that it includes a second part that is provided adjacent to one part and has a gap between the first part and the neck part.

  In this invention, since the reinforcing body formed separately from the housing main body is provided outside the neck portion, that is, the neck portion is reinforced by the reinforcing body from the outside, it is possible to prevent the neck portion from being greatly deformed. be able to. Moreover, since the reinforcement body is comprised including the site | part which has a clearance gap between neck parts, the degree of the heat conduction between a housing main body and a reinforcement body can be reduced.

  (6) The invention according to claim 6 is a wheel housing of a turbocharger, wherein a gas passage is formed in a housing body, and a neck portion that forms an end portion of the gas passage is formed in a part of the housing body. A flange that is formed separately from the housing body and connected to an exhaust pipe or an intake pipe is formed outside the neck, and an exhaust pipe or an intake pipe that is formed separately from the housing body and is connected to the flange. And a reinforcing body positioned on the opposite side of the flange, and a gap is formed between the flange and the reinforcing body.

  In this invention, since the reinforcing body formed separately from the housing main body is provided outside the neck portion, that is, the neck portion is reinforced by the reinforcing body from the outside, it is possible to prevent the neck portion from being greatly deformed. be able to. Moreover, since the clearance gap is provided between the flange and the reinforcing body, the degree of heat conduction between the flange and the reinforcing body can be reduced.

  (7) The invention according to claim 7 is the turbocharger according to claim 6, wherein the reinforcing body has a gap between the first portion joined to the outside of the neck portion and the neck portion. The gist is that the second part is included.

  In this invention, since the reinforcing body is configured including the part joined to the outside of the neck part and the part having a gap between the neck part, the degree of heat conduction between the housing main body and the reinforcing body is set. Can be reduced.

  (8) According to an eighth aspect of the present invention, in the wheel housing of the turbocharger according to the fifth or seventh aspect, the reinforcing body includes a plurality of the first portion and the second portion, respectively. The gist is that the first part and the second part are alternately provided in the circumferential direction.

  In the present invention, since the first portion and the second portion are alternately provided in the circumferential direction in the reinforcing body, when heat conduction is performed between the housing main body and the reinforcing body, the housing main body and the reinforcing body are provided. It is possible to suppress the occurrence of a large bias in the heat distribution in each of the above.

  (9) The invention according to claim 9 is the turbocharger wheel housing according to claim 5, 7 or 8, wherein the reinforcing body is formed between the neck portion toward one side in a circumferential direction. A circumferential portion including a portion A in which the gap gradually increases, and a portion B in which the gap formed between the end portion of the portion A and the neck portion gradually decreases from one end in the circumferential direction. The adjacent portions of the plurality of angled portions arranged in a row are connected to each other, and the portion where the adjacent angled portions are connected to each other is the second portion of the reinforcing body. The gist of this is that.

  In the present invention, a reinforcing body having a structure in which adjacent ones of the plurality of chevron portions arranged in the circumferential direction are connected to each other is provided, that is, the reinforcing body is continuous in the circumferential direction. Therefore, compared with the case where a plurality of non-continuous reinforcement bodies are provided, it is possible to reduce the labor of attaching the reinforcement body to the housing body.

  (10) The invention according to claim 10 is the wheel housing of the turbocharger according to any one of claims 1 to 9, wherein the housing body and the reinforcing body are joined by brazing. It is said.

  In this invention, since the housing main body and the reinforcing body are joined by brazing, the housing main body and the reinforcing body are distorted due to heat during welding as compared with the case where the housing main body and the reinforcing body itself are melted and joined. Can be reduced.

  (11) The invention according to claim 11 is the wheel housing of the turbocharger according to any one of claims 1 to 10, wherein the housing body is made of a sheet metal including a scroll-shaped portion and the neck portion. It is provided with a scroll body and a base body including a flange portion joined to the scroll body, and the gist is that the gas passage is formed between the scroll body and the base body. Yes.

  In the present invention, since the scroll body is made of sheet metal, the wheel housing can be reduced in weight and the heat capacity can be reduced. Moreover, although the strength of the neck portion is smaller than that of a cast scroll body, the neck portion is reinforced by the reinforcing body, so that deformation of the neck portion can be suppressed.

  (12) The gist of the invention described in claim 12 is that the turbine housing of the turbocharger is configured as the wheel housing according to any one of claims 1 to 11.

  (13) The invention according to claim 13 is the turbine housing of the turbocharger according to claim 12, wherein the turbine housing is an inlet-side neck provided on the exhaust inlet side as the neck and an outlet provided on the exhaust outlet side. It includes a side neck portion, and the gist is that the reinforcing body is provided on the inlet side neck portion of the inlet side neck portion and the outlet side neck portion.

  Since the inlet side neck portion is a part of the part that forms the scroll passage in the turbine housing, that is, the shape is more restricted than the outlet side neck portion, it is difficult to incorporate a structure with high strength. In the said invention, since the reinforcement body is provided in such an entrance side neck part, it can suppress more reliably that a deformation | transformation arises in an entrance side neck part.

  (14) The gist of the invention according to claim 14 is that the compressor housing of the turbocharger is configured as the wheel housing according to any one of claims 1 to 11.

  (15) The invention according to claim 15 is the compressor housing of the turbocharger according to claim 14, wherein the compressor housing is an inlet side neck provided on the intake inlet side as the neck and an outlet provided on the intake outlet side. It includes a side neck portion, and the gist is that the reinforcing body is provided on the outlet side neck portion of the inlet side neck portion and the outlet side neck portion.

  Since the outlet side neck part becomes a part of the part that forms the scroll passage in the compressor housing, that is, since the restriction on the shape is larger than that of the inlet side neck part, it is difficult to incorporate a structure with high strength. In the said invention, since the reinforcement body is provided in such an exit side neck part, it can suppress more reliably that a deformation | transformation arises in an exit side neck part.

  (16) The gist of the invention described in claim 16 is a turbocharger including the wheel housing according to any one of claims 1-12.

The schematic diagram which shows typically the structure of the whole turbocharger about 1st Embodiment which actualized the turbocharger of this invention. The perspective view which shows the perspective structure about the turbine housing of the embodiment. The perspective view which shows the disassembled perspective structure about the turbine housing of the embodiment. Sectional drawing which shows the cross-sectional structure which follows the DA-DA line | wire of FIG. 2 about the turbine housing of the embodiment. Sectional drawing which shows the cross-sectional structure which follows the DB-DB line | wire of FIG. 2 about the turbine housing of the embodiment. Sectional drawing which shows the cross-sectional structure which follows the DC-DC line | wire of FIG. 5 about the turbine housing of the embodiment. The side view which shows the side structure around the neck part of a turbine housing about 2nd Embodiment which actualized the turbocharger of this invention. Sectional drawing which shows the cross-sectional structure which follows the DD-DD line of FIG. 7 about the turbine housing of the embodiment. Sectional drawing which expands and shows the cross-section of the B section of FIG. 8 about the turbine housing of the embodiment. Sectional drawing which shows the cross-section corresponding to the cross-section of FIG. 6 about the 1st modification of the turbine housing of this invention. Sectional drawing which shows the cross-sectional structure corresponding to the cross-sectional structure of FIG. 8 about the 2nd modification of the turbine housing of this invention.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, an example in which the present invention is embodied as a turbine housing of a turbocharger of an internal combustion engine is shown.

  As shown in FIG. 1, the turbocharger 1 includes a turbine wheel 21 that rotates by the energy of exhaust, a compressor wheel 22 that compresses intake air as the wheel 21 rotates, and a rotor shaft 23 that connects these wheels. A turbine housing 11 that houses the turbine wheel 21, a compressor housing 12 that houses the compressor wheel 22, and a center housing 13 that houses the rotor shaft 23 are provided. An exhaust pipe 91 and an intake pipe 92 are connected to the turbine housing 11 and the compressor housing 12, respectively.

  In the turbocharger 1, the turbine wheel 21 and the compressor wheel 22 are connected to the rotor shaft 23, so that these three elements rotate integrally. Further, the turbine housing 11, the compressor housing 12 and the center housing 13 are connected to each other.

  In the turbine housing 11, an exhaust passage 80 is formed for flowing the exhaust from the exhaust pipe 91 on the upstream side of the turbine housing 11 to the exhaust pipe 91 on the downstream side of the turbine housing 11. The exhaust passage 80 includes a storage chamber 42A that houses the turbine wheel 21, a scroll passage 81 that supplies exhaust gas from the upstream exhaust pipe 91 to the storage chamber 42A, and exhaust gas from the turbine wheel 21 that is downstream of the exhaust pipe 91. And an outlet passage 82 that feeds out the water.

The structure of the turbine housing 11 will be described with reference to FIGS.
As shown in FIG. 2, the turbine housing 11 includes a scroll body 30 and a base body 40 as a housing body, an inlet flange 71 to which an exhaust pipe on the upstream side of the turbine housing 11 is connected, and an exhaust on the downstream side of the turbine housing 11. And an outlet flange 72 to which the tube is connected. The housing body is configured by combining a scroll body 30 having a scroll portion 31 and a base body 40 having a flange portion 43 with each other. As the scroll body 30, a press-molded sheet metal is used. As the base body 40, the inlet flange 71, and the outlet flange 72, castings are used.

  As shown in FIG. 3, the scroll body 30 includes a disk-shaped scroll portion 31 and a neck portion 35 that forms the entrance of the scroll body 30. The scroll portion 31 includes a passage portion 32 that includes a circumferential wall extending in the circumferential direction and a top wall extending in the radial direction to form a scroll passage 81, and a first joint portion 34 that is joined to the cylindrical portion 41 of the base body 40. A second joint portion 33 to be joined to the flange portion 43 of the base body 40 is provided.

  An inlet flange 71 is joined to the outside of the neck portion 35. Two reinforcing bodies 50 formed separately from the scroll body 30 are joined to the inside of the neck portion 35. Each reinforcing body 50 includes two arc-shaped joint portions 51 corresponding to the inner periphery of the neck portion 35 of the scroll body 30 and a columnar rectifying portion 52 that connects the two joint portions 51 to each other.

  In the base body 40, a circular flange portion 43 for connecting the center housing 13 (see FIG. 1) and the turbine housing 11, a cylindrical portion 41 into which the joint portion 33 and the outlet flange 72 of the scroll body 30 are fitted, A storage portion 42 for storing the turbine wheel 21 is provided. The storage portion 42 is provided in a manner that connects the cylindrical portion 41 and the flange portion 43. The storage portion 42 is provided with a communication passage 42B that connects the scroll passage 81 and the storage chamber 42A.

With reference to FIG. 4, the longitudinal cross-sectional structure of the turbine housing 11 is demonstrated. This figure shows a cross-sectional structure of the turbine housing 11 along the line DA-DA in FIG. A one-dot chain line P in the figure indicates the center line of the turbine housing 11 and the turbine wheel 21.
-Each element of the turbine housing 11 is combined as follows.

  An outlet flange 72 is fitted on the outer side of the distal end portion 41 </ b> C of the cylindrical portion 41 of the base body 40. The outer peripheral surface 41A of the tip portion 41C and the inner peripheral surface 72A of the outlet flange 72 are joined to each other by brazing.

  The first joint 34 of the scroll body 30 is fitted on the outer side of the base end portion 41 </ b> B of the cylindrical portion 41 of the base body 40. The outer peripheral surface 41A of the base end portion 41B and the inner peripheral surface 31A of the first joint portion 34 are joined to each other by brazing.

  A gap is formed between the top surface 42C of the storage portion 42 of the base body 40 and the inner peripheral surface 31A of the scroll portion 31 of the scroll body 30 between the top surface 42C and the inner peripheral surface on the radially outer side of the top surface 42C. Are in contact with each other so that they are not.

  The second joint portion 33 of the scroll body 30 is fitted on the outer side of the flange portion 43 of the base body 40. The outer peripheral surface 43B of the flange portion 43 and the inner peripheral surface 31A of the second joint portion 33 are joined to each other by brazing.

An exhaust passage is formed in the turbine housing 11 as follows.
A scroll passage 81 is formed between the scroll portion 31 and the storage portion 42 and the flange portion 43. An outlet passage 82 is formed in the cylindrical portion 41. The scroll passage 81 communicates with the entrance of the storage chamber 42A via the communication passage 42B. The outlet passage 82 communicates with the outlet of the storage chamber 42A.

  FIG. 5 shows a cross-sectional structure of the turbine housing 11 taken along line DB-DB in FIG. A point P in the figure indicates the center line of the turbine housing 11 and the turbine wheel 21. An arrow RA in the figure indicates the direction of rotation of the turbine wheel 21.

  An inlet flange 71 is fitted on the outside of the inlet side joint 36 of the neck 35. The outer peripheral surface 36B of the inlet side joint portion 36 and the inner peripheral surface 71A of the inlet flange 71 are joined to each other by brazing.

Exhaust gas flows through the turbine housing 11 as follows.
As indicated by the arrow GA, the exhaust from the exhaust pipe 91 on the upstream side of the turbine housing 11 flows into the scroll passage 81 through the opening of the neck 35. Incidentally, a turbulent flow is generated in the exhaust flow from the exhaust pipe 91. In addition, when exhaust from the exhaust pipe 91 flows into the scroll passage 81, a swirl flow that swirls in the circumferential direction of the neck 35 may be formed. Since this swirl flow does not form an exhaust flow for rotating the turbine wheel, the efficiency of supercharging decreases.

  In the turbine housing 11, the exhaust flow flowing into the scroll passage 81 is rectified by the rectifying action of the reinforcing body 50 provided at the neck portion 35, so that the scroll passage 81 is compared with the case where the reinforcing body 50 is not provided. The turbulence and swirling flow of exhaust flowing through the

  As indicated by an arrow GB, the exhaust gas flowing into the inlet of the scroll passage 81 flows in the circumferential direction around the storage portion 42 in the passage 81 and in the process flows into the storage chamber 42A via the communication passage 42B. .

  As indicated by an arrow GC, the exhaust gas flowing into the storage chamber 42 </ b> A is sent to the outlet passage 82 as the wheel 21 rotates after colliding with the blades of the turbine wheel 21. The exhaust sent to the outlet passage 82 passes through the passage 82 and flows into the exhaust pipe 91 on the downstream side of the turbine housing 11.

FIG. 6 shows a cross-sectional structure of the neck portion 35 along the DC-DC line of FIG.
The outer peripheral surface 51 </ b> B of the joint portion 51 of the reinforcing body 50 is joined to the inner peripheral surface 35 </ b> A of the neck portion 35. Each reinforcing body 50 is fixed to the neck portion 35 by joining the two joint portions 51 to the neck portion 35. The rectifying portion 52 of the reinforcing body 50 is provided at a location passing through the center C of the neck portion 35. The two joint portions 51 of the reinforcing body 50 are provided so as to face each other via the center C in the radial direction of the neck portion 35.

  Each reinforcing body 50 is joined to the neck portion 35 such that the respective rectifying portions 52 intersect and contact each other when projected onto the flow path cross section along the radial direction of the neck portion 35. In the cross section of the flow path on which each reinforcing member 50 is projected, the scroll passage 81 is divided into four regions by the rectifying unit 52 of each reinforcing member 50. Here, since the angle formed by one rectifying unit 52 and the other rectifying unit 52 is set to 90 degrees, the four regions have the same size.

According to this embodiment, the following effects can be obtained.
(1) In the present embodiment, since the reinforcing body 50 formed separately from the scroll body 30 is provided inside the neck portion 35, that is, the neck portion 35 is reinforced by the reinforcing body 50 from the inside, the neck portion It is possible to suppress the large deformation of 35.

  (2) In the present embodiment, a sheet metal is used as the scroll body 30. Thereby, since it is thinned compared with the case where a cast scroll body is used, the weight of the turbocharger 1 can be reduced and the heat capacity of the turbine housing 11 can be reduced. Further, although the strength of the neck portion 35 becomes smaller than that of the cast product as the thickness is reduced, the reinforcement member 50 is provided on the neck portion 35. Therefore, the neck portion 35 is deformed while reducing the weight and reducing the heat capacity as described above. Can be suppressed.

  (3) When the flow of exhaust flowing into the turbine housing 11 is in a non-uniform state, the pressure loss of the exhaust increases in the exhaust passage 80 in the housing 11. In addition, when exhaust from the exhaust pipe 91 flows into the scroll passage 81, a swirl flow that swirls in the circumferential direction may be formed at the neck portion 35. In this embodiment, since the rectification part 52 which rectifies | straightens the flow of exhaust is provided inside the neck part 35, the flow of the exhaust flowing into the turbine housing 11 is rectified. Thereby, it is possible to reduce the pressure loss of the exhaust gas and to suppress the reduction in supercharging efficiency caused by the swirling flow.

  (4) In the present embodiment, the rectifying section 52 has a columnar shape, and the joint section 51 has a cross section perpendicular to the exhaust flow direction of the exhaust passage 80 as a flow path section. It has an arc shape along the inner periphery of the neck 35. And since the length of the string of the junction part 51 is made larger than the width | variety of the rectification | straightening part 52, the junction area of the neck part 35 and the junction part 51 is fully ensured. Therefore, the joint between the neck portion 35 and the reinforcing body 50 can be further strengthened.

  (5) In the present embodiment, when the two reinforcing bodies 50 are projected on the cross section of the flow path, the respective rectifying parts 52 are provided on the neck part 35 so as to intersect each other. For this reason, the effect | action which rectifies | straightens the flow of the gas which flows into a wheel housing or the flow of the gas which flows out from a wheel housing can be heightened compared with the case where only one reinforcement body is provided.

  (6) In this embodiment, since the scroll body 30 and the reinforcing body 50 are joined by brazing, compared with the case where the scroll body 30 and the reinforcing body 50 are melted and joined, the heat is generated during welding. The distortion of the scroll body 30 and the reinforcing body 50 can be reduced.

  (7) In the present embodiment, the turbine housing 11 includes the scroll body 30 including the scroll-shaped portion and the neck portion 35, and the base body 40 including the flange portion 43 joined to the scroll body 30. The exhaust passage 80 is formed between the scroll body 30 and the base body 40. Since the scroll body 30 is made of sheet metal, the turbine housing 11 can be reduced in weight and the heat capacity can be reduced.

  (8) The turbine housing 11 includes an inlet-side neck portion 35 provided on the exhaust inlet side as the neck portion 35 and a cylindrical portion 41 as an outlet-side neck portion provided on the exhaust outlet side. Since the neck portion 35 on the inlet side becomes a part of the portion that forms the scroll passage 81 in the turbine housing 11, that is, there are more restrictions on the shape than the cylindrical portion 41 on the outlet side, a structure that increases the strength is adopted. Hateful. In the present embodiment, since the reinforcing body 50 is provided in the neck portion 35 on the inlet side, it is possible to more reliably suppress deformation of the neck portion 35 on the inlet side. Further, since the reinforcing body 50 is provided only in the former of the neck portion 35 on the inlet side and the neck portion on the outlet side, the weight of the turbine housing 11 can be reduced as compared with the case where the reinforcing body 50 is provided on both. Can do.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS.
In the said 1st Embodiment, the deformation | transformation of the neck part 35 is suppressed by joining the reinforcement body 60 inside the neck part 35 of the scroll body 30. FIG. On the other hand, in the present embodiment, the deformation of the neck portion 35 is suppressed by joining the reinforcing body 60 to the outside of the neck portion 35 of the scroll body 30. Since the turbocharger 1 of the present embodiment employs the same configuration as that of the first embodiment except for the above-described changes, common portions are denoted by the same reference numerals and description thereof is omitted. .

  As shown in FIG. 7, a reinforcing body 60 formed separately from the scroll body 30 is provided on the outer peripheral surface 35 </ b> B of the neck portion 35. The reinforcing body 60 is joined to the neck portion 35 by forming a gap S between the side surface of the inlet flange 71.

FIG. 8 shows a cross-sectional structure of the neck portion 35 along the line DD-DD in FIG.
The reinforcing body 60 has a structure in which adjacent ones of the plurality of chevron portions 61 arranged in the circumferential direction are connected to each other. Then, the joint portion 62 (see FIG. 9), which is a portion where the adjacent chevron portions 61 are joined together, and the vicinity thereof are joined to the neck portion 35, thereby being fixed to the outside of the neck portion 35. Thereby, the outer peripheral surface 35B of the neck part 35 is surrounded by the reinforcement body 60 over the whole circumferential direction. A gap 64 is formed between the inner peripheral surface 60 </ b> A of the portion other than the joint portion 62 of the chevron 61 and the outer peripheral surface 35 </ b> B of the neck portion 35.

FIG. 9 shows an enlarged structure of the chevron 61 (enlarged structure of portion B in FIG. 8).
A first inclined portion 61A of one angle-shaped portion 61 and a second inclined portion 61B of another angle-shaped portion 61 on the opposite side of the direction RA with respect to the angle-shaped portion 61 are connected to each other to form one joint portion. 62 is formed. Further, the second inclined portion 61B of one mountain-shaped portion 61 and the first inclined portion 61A of another mountain-shaped portion 61 located on the direction RA side with respect to the mountain-shaped portion 61 are connected to each other to form one joint portion 62. Is formed. The inner peripheral surface 60 </ b> A of the joint portion 62 and the outer peripheral surface 35 </ b> B of the neck portion 35 are joined by brazing with a brazing material 63.

  One chevron 61 extends from the end portion on the direction RA side of the inclined portion 61A toward the direction RA by extending from the first inclined portion 61A that is separated from the neck portion 35 toward the direction RA that is one of the circumferential directions. The second inclined portion 61B close to the neck portion 35 is configured.

  That is, the first inclined portion 61A is inclined with respect to the neck portion 35 so that the distance TX between the inner peripheral surface 60A and the outer peripheral surface 35B of the neck portion 35 gradually increases in the direction RA. Further, the second inclined portion 61B is inclined with respect to the neck portion 35 so that the distance TX between the inner peripheral surface 60A and the outer peripheral surface 35B of the neck portion 35 gradually decreases in the direction RA.

  Therefore, the distance TX between the inner peripheral surface 60A of the chevron 61 and the outer peripheral surface 35B of the neck 35 is the minimum at the bottom 61D near the center of the joint 62, and the vertex is the center of two adjacent bottoms 61D. Maximum at 61C.

  According to the present embodiment, in addition to the effect (1) of the first embodiment, that is, the effect of suppressing the occurrence of large deformation in the neck and the effects (6) to (8) of the embodiment, The following effects can be obtained.

  (9) In the present embodiment, the reinforcing body 60 formed separately from the scroll body 30 is provided outside the neck portion 35. The reinforcing body 60 includes a joint portion 62 that is joined to the outside of the neck portion 35 and a portion that is provided adjacent to the joint portion 62 in the circumferential direction of the neck portion 35 and that has a gap 64 between the neck portion 35. It is. Since the neck part 35 is reinforced by the reinforcing body 60 from the outside, it is possible to suppress the neck part 35 from being greatly deformed. Moreover, since the reinforcement body 60 is comprised including the site | part which has the clearance gap 64 between the neck parts 35, the degree of the heat conduction between a housing main body and the reinforcement body 60 can be reduced. Therefore, it is possible to suppress a decrease in the amount of heat of the exhaust before colliding with the turbine wheel 21, that is, a decrease in energy for rotating the turbine wheel 21. Further, since the reinforcing body 60 is provided with the portions having the joint portions 62 and the gaps 64 alternately in the circumferential direction, when heat conduction is performed between the scroll body 30 and the reinforcing body 60, the scroll body 30 and It is possible to suppress the occurrence of a large bias in the heat distribution in each of the reinforcing bodies 60. Since the gap S is formed between the inlet flange 71 and the reinforcing body 60, the degree of heat conduction between the inlet flange 71 and the reinforcing body 60 can be reduced. Further, since the reinforcing body 60 is provided on the outer side, the work at the time of joining can be easily performed as compared with the case where the reinforcing body 60 is provided on the inner side.

  (10) In the present embodiment, the reinforcing body 60 includes the first inclined portion 61A in which the gap 64 formed between the neck portion 35 and the end portion of the first inclined portion 61A gradually increases toward the one side in the circumferential direction. Is provided with a chevron portion 61 including a second inclined portion 61B in which a gap 64 formed between the neck portion 35 and the neck portion 35 gradually decreases from one end to the other in the circumferential direction. Adjacent ones of the plurality of chevron portions 61 arranged in the circumferential direction have a structure joined together. That is, since the reinforcing body 60 is continuous in the circumferential direction, the labor for attaching the reinforcing body 60 to the housing body can be reduced as compared with the case where a plurality of non-continuous reinforcing bodies are provided.

  (11) In the present embodiment, the reinforcing body 60 includes a plurality of joint portions 62 provided alternately in the circumferential direction, so that the joint portions 62 are disposed at a plurality of locations on the circumference of the neck portion 35. Become. That is, the entire neck portion 35 can be reinforced compared to the case where the neck portion 35 is joined at only one place.

  (12) In this embodiment, since the reinforcing body 60 is wound around the entire circumference of the neck portion 35, the deformation of the neck portion 35 is more suitable as compared with the case where it is provided only on a part of the circumference of the neck portion 35. Can be suppressed.

(Other embodiments)
The embodiments of the present invention are not limited to the above-described embodiments, and for example, the embodiments can be implemented as modified forms as shown below. The following modifications are not applied only to the above embodiments, and different modifications can be combined with each other.

  In the first embodiment, the configuration of the reinforcing body 50 includes the two arc-shaped joint portions 51 corresponding to the inner periphery of the neck portion 35 and the rectifying portion 52 that connects the two joint portions 51 to each other. Although adopted, the configuration of the reinforcing body is not limited to this. For example, as shown in FIG. 10, a reinforcing body 53 including an annular joint portion 54 joined to the inner peripheral surface of the neck portion 35 and a plurality of rectifying portions 55 arranged in a lattice shape inside the joint portion 54. Can be joined to the inside of the neck 35.

  In the first embodiment, each reinforcing body 50 is joined to the neck 35 so that the respective rectifying sections 52 are orthogonal to each other when each of the reinforcing bodies 50 is projected onto the flow path cross section along the radial direction of the neck 35. However, each reinforcing body 50 can be joined to the neck portion 35 so that the angle formed by the rectifying unit 52 when projected is other than 90 degrees.

  In the first embodiment, each reinforcing body 50 is disposed so that the rectifying portion 52 of one reinforcing body 50 and the rectifying portion 52 of the other reinforcing body 50 are in contact with each other. The reinforcing bodies 50 can be arranged so that the portions 52 do not contact each other, that is, at intervals in the length direction of the exhaust passage 80.

  In the first embodiment, the configuration having the arc-shaped joint portion 51 is adopted as the configuration of the reinforcing body 50, but the shape of the joint portion 51 may be changed to an annular shape. In this case, one reinforcing member 50 is provided with one joint 51.

  In the first embodiment, two reinforcing bodies 50 are joined to the neck portion 35, but one reinforcing body 50 can be omitted and only one reinforcing body 50 can be joined to the neck portion 35. In addition to the two reinforcing bodies 50, one or a plurality of reinforcing bodies 50 can be joined to the neck portion 35, and a total of three or more reinforcing bodies 50 can be joined to the neck portion 35.

  In the first embodiment, a configuration in which the joints 51 are provided at both ends of the rectifying unit 52 as the configuration of the reinforcing body 50 is used, but the two joints 51 are omitted and the rectifying unit 52 is directly connected. In particular, it can be joined to the inner peripheral surface 35 </ b> A of the neck 35.

  In the first embodiment, the configuration including the joint portion 51 and the rectifying unit 52 is adopted as the configuration of the reinforcing body 50, but the rectifying unit 52 may be omitted. That is, the reinforcing body can be configured to have only the former of the function of reinforcing the neck portion 35 and the function of rectifying the exhaust. An annular shape can also be adopted as the shape of the joint portion 51 in this case.

  In the second embodiment, the configuration of the reinforcing body 60 employs a configuration in which a plurality of mountain-shaped portions 61 are arranged in the circumferential direction and adjacent mountain-shaped portions 61 are connected to each other. Not limited to this. For example, as shown in FIG. 11, a pentagonal reinforcing body 65 having a neck 35 as an inscribed circle may be used. In this case, the reinforcing body 65 and the neck portion 35 are joined to each other at the joint portion 66 where the inner peripheral surface 65A of each side of the reinforcing body 65 and the neck portion 35 are in contact. Further, between one of the portions where the reinforcing body 65 and the neck portion 35 are joined and the joined portion adjacent thereto, the space between the inner peripheral surface 65A of the reinforcing body 60 and the outer peripheral surface 35B of the neck portion 35 is between. A gap 67 is formed. In addition, as the shape of the reinforcing body, a polygon other than a pentagon having the neck 35 as an inscribed circle may be employed.

In the second embodiment, all of the joint portions 62 and the neck portion 35 of the reinforcing body 60 are joined, but a part of the joint portions 62 may be changed to a configuration that does not join the neck portion 35.
In the second embodiment, as the configuration of the reinforcing body 60, a configuration in which a plurality of chevron portions 61 having the same circumferential length are arranged in the circumferential direction is employed, but the circumferential lengths are different from each other. It is also possible to change the configuration in which the chevron portions 61 are arranged in the circumferential direction. As an example, a configuration in which the chevron portions 61 having relatively large circumferential lengths and the chevron portions 61 having relatively small circumferential lengths are alternately arranged in the circumferential direction can be mentioned.

  In the second embodiment, the reinforcing body 60 is provided over the entire circumferential direction of the outer circumferential surface 35B of the neck portion 35, but a reinforcing body having a shape corresponding to only a part of the outer circumferential surface 35B can also be used. As an example, a discontinuous annular reinforcement body in which a notch is formed in a part of the annular reinforcement body can be mentioned.

  In each of the above embodiments, the reinforcing members 50 and 60 are provided on the neck 35 constituting the inlet portion of the scroll passage 81. However, the reinforcing members 50 and 60 are provided on the cylindrical portion 41 of the base body 40 as the neck. You can also.

  In each of the above embodiments, the reinforcing bodies 50 and 60 and the neck portion 35 are joined by brazing, but the joining method of the reinforcing bodies 50 and 60 and the neck portion 35 is not limited to this. For example, a method of melting and joining the base materials themselves, a method of joining by press-fitting or caulking, or a method of joining by a fastening member such as a bolt can be employed.

  In each of the above embodiments, the turbine housing 11 is configured such that the scroll body 30, the base body 40, the inlet flange 71, and the outlet flange 72 formed separately are joined. It is not limited to. For example, at least one of the structures formed separately can be further divided into a plurality of structures. Further, at least two of the above structures can be formed as a single structure.

In each of the above embodiments, the scroll body 30 is made of a sheet metal, but the scroll body 30 can be changed to a casting or a resin.
In each of the above embodiments, a cast body is used as the base body 40. However, the base body 40 may be changed to a sheet metal or resin.

  In the above embodiments, the present invention is applied only to the former of the turbine housing 11 and the compressor housing 12, but the present invention can also be applied to each housing. Further, the present invention can be applied only to the compressor housing 12.

  DESCRIPTION OF SYMBOLS 1 ... Turbocharger, 11 ... Turbine housing (wheel housing), 12 ... Compressor housing, 13 ... Center housing, 21 ... Turbine wheel, 22 ... Compressor wheel, 23 ... Rotor shaft, 30 ... Scroll body, 31 ... Scroll part, 31A ... inner peripheral surface, 32 ... passage portion, 33 ... second joint portion, 34 ... first joint portion, 35 ... neck portion (inlet side neck portion), 35A ... inner peripheral surface, 35B ... outer peripheral surface, 36 ... inlet side joint portion 36B ... Outer peripheral surface, 40 ... Base body, 41 ... Cylindrical portion (exit side neck), 41A ... Outer peripheral surface, 41B ... Base end portion, 41C ... Tip end portion, 42 ... Storage portion, 42A ... Storage chamber, 42B ... Continuous Passage, 42C ... top surface, 43 ... flange portion, 43B ... outer peripheral surface, 50 ... reinforcing body, 51 ... joining portion, 51B ... outer peripheral surface, 52 ... rectifying portion, 53 ... reinforcing body, 54 ... joining 55 ... rectifying part, 60 ... reinforcing body, 60A ... inner peripheral surface, 61 ... mountain shaped part, 61A ... first inclined part, 61B ... second inclined part, 61C ... vertex, 61D ... bottom point, 62 ... joined part, 63 ... brazing material, 64 ... gap, 65 ... reinforcing body, 65A ... inner peripheral surface, 66 ... joint, 67 ... gap, 71 ... inlet flange, 71A ... inner peripheral surface, 72 ... outlet flange, 72A ... inner peripheral surface , 80 ... exhaust passage (gas passage), 81 ... scroll passage, 82 ... outlet passage, 91 ... exhaust pipe, 92 ... intake pipe.

Claims (16)

In a turbocharger wheel housing, wherein a gas passage is formed inside the housing body, and a neck portion that forms an end portion of the gas passage in a part of the housing body,
A turbocharger wheel housing, wherein a reinforcing body formed separately from the housing main body is provided inside the neck portion. The turbocharger wheel housing according to claim 1,
The turbocharger wheel housing, wherein the reinforcing body includes a joint portion joined to an inner peripheral surface of the neck portion, and a rectifying portion for rectifying a gas flow. The wheel housing of the turbocharger according to claim 2,
The rectifying unit has a columnar shape,
When the cross section perpendicular to the gas flow direction of the gas passage is a flow path cross section, the joint portion forms an arc shape along the inner circumference of the neck portion,
The turbocharger wheel housing characterized in that a string length of the joint portion is larger than a width of the rectifying portion. The wheel housing of the turbocharger according to claim 3,
As the reinforcing body, a first reinforcing body and a second reinforcing body are provided,
The first reinforcing body and the second reinforcing body are provided on the neck portion in such a manner that the respective rectifying sections intersect each other when the respective reinforcing bodies are projected onto the flow path cross section. Turbocharger wheel housing. In a turbocharger wheel housing, wherein a gas passage is formed inside the housing body, and a neck portion that forms an end portion of the gas passage in a part of the housing body,
On the outside of the neck portion, a reinforcing body formed separately from the housing body is provided,
The reinforcing body has a first portion joined to the outside of the neck portion and a second portion provided adjacent to the first portion in the circumferential direction of the neck portion and having a gap between the neck portion and the second portion. The wheel housing of a turbocharger characterized by comprising: In a turbocharger wheel housing, wherein a gas passage is formed inside the housing body, and a neck portion that forms an end portion of the gas passage in a part of the housing body,
Outside the neck, a flange formed separately from the housing body and connected to an exhaust pipe or an intake pipe, and formed separately from the housing body and exhaust pipe or intake air to the flange. A reinforcing body located on the opposite side of the tube,
A turbocharger wheel housing, wherein a gap is formed between the flange and the reinforcing body. The turbocharger according to claim 6, wherein
The turbocharger wheel housing according to claim 1, wherein the reinforcing body includes a first portion joined to the outside of the neck portion and a second portion having a gap between the neck portion. The turbocharger wheel housing according to claim 5 or 7,
The reinforcing body includes a plurality of the first part and the second part, respectively, and the first part and the second part are alternately provided in the circumferential direction. housing. The turbocharger wheel housing according to claim 5, 7 or 8,
The reinforcing body is formed between a portion A in which a gap formed between the neck portion and the neck portion gradually increases toward one side in the circumferential direction, and the neck portion as it extends from the end portion of the portion A toward one side in the circumferential direction. And a portion B that includes a portion B where the gap formed gradually becomes smaller, and the adjacent portions among the plurality of angle portions arranged in the circumferential direction are connected to each other.
The turbocharger wheel housing is characterized in that the portion where the adjacent chevron portions are connected to each other corresponds to the second portion in the reinforcing body. In the wheel housing of the turbocharger according to any one of claims 1 to 9,
The turbocharger wheel housing, wherein the housing body and the reinforcing body are joined by brazing. In the wheel housing of the turbocharger described in any one of Claims 1-10,
The housing body includes a scroll body made of sheet metal including a scroll-shaped portion and the neck portion, and a base body including a flange portion joined to the scroll body.
The wheel housing, wherein the gas passage is formed between the scroll body and the base body. In the turbocharger turbine housing,
It is comprised as a wheel housing as described in any one of Claims 1-11. The turbine housing of the turbocharger characterized by the above-mentioned. The turbine housing of the turbocharger according to claim 12,
The turbine housing includes an inlet side neck portion provided on the exhaust inlet side as the neck portion and an outlet side neck portion provided on the exhaust outlet side,
The said reinforcing body is provided in the said inlet side neck part among the said inlet side neck part and the said outlet side neck part. The turbine housing of the turbocharger characterized by the above-mentioned. In the turbocharger compressor housing,
It is comprised as a wheel housing as described in any one of Claims 1-11. The compressor housing of the turbocharger characterized by the above-mentioned. The turbocharger compressor housing according to claim 14,
The compressor housing includes an inlet-side neck provided on the intake inlet side and an outlet-side neck provided on the intake outlet side as the neck.
The said reinforcing body is provided in the said exit side neck part among the said entrance side neck part and the said exit side neck part. The turbine housing of the turbocharger characterized by the above-mentioned.   A turbocharger including the wheel housing according to any one of claims 1 to 15.

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